I've seen plenty of them being sold as parts on eBay, and other places that are known for selling used Macintosh systems and components. The PSUs in the more modern iMacs have enough power for a decent mid-range rig, and they also look the part (they're mostly black so they can go with almost anything). They will require some modding in order to work but I have no idea of how well they could work with PC builds. What do you think of these PSUs? Are there any modding projects that have used them?